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All Journal AUSTENIT Mechatronics, Electrical Power, and Vehicular Technology Jurnal INKOM Turbo : Jurnal Program Studi Teknik Mesin Turbulen : Jurnal Teknik Mesin Teknologi Indonesia
Hendri Maja Saputra
Research Center for Electrical Power and Mechatronics, Indonesian Institute of Sciences, Komp. LIPI Bandung, Jl. Sangkuriang, Gd. 20. Lt. 2, Bandung 40135
Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Teknologi Indonesia

 1 
THE EFFECT OF DIGITAL PWM STEADY STATE RESPONSE ON THE SPEED OF BLDC MOTOR Rahmayanti, Rifa; Utomo, Sapdo; Saputra, Hendri Maja
Teknologi Indonesia Vol 38, No 3 (2015)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v38i3.244

Abstract

This research aims to analyze the work system of a brushless DC (BLDC) motor speed driver. The motor is controlled by a driver which receives speed command signal from a microcontroller. Effect of digital Pulse Width Modulation (PWM) command signal on the speed response of the motor is investigated by changing duty ratio from 30% to 100% and frequency between 500Hz?100kHz. Each speed response is compared against the speed response of the corresponding analog command signal. From the experimental results, it can be concluded that larger switching frequency provides smaller steady state error and smaller standard deviation in the speed response. More specifically, for the BLDC motor used in the experiments, steady state error of 5% rotational speed can be achieved only by a digital PWM command signal the duty cycle ratio of which is larger than 60% and the frequency of which is larger than 1 kHz.
ANALISIS KINEMATIK DAN DINAMIK MEKANISME PENGGERAK 2-DOF UNTUK ANTENA BERGERAK PADA KOMUNIKASI SATELIT Saputra, Hendri Maja; Rijanto, Estiko
Teknologi Indonesia Vol 32, No 1 (2009)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v32i1.52

Abstract

Kinematic and dynamic analysis of a mechanism for mobile antennas used in positioning control system of mobile satellite communication (SATCOM) antennas has been conducted. This antenna driving mechanism has two degrees of freedom (2-DOF), they are azimuth and elevation directions. The antenna driving mechanism is put on a vehicle (either land or water), so that the analysis includes vehicle body disturbance in three directions (3-DOF), namely roll, pitch, and yaw. The dynamical model has been made using D-H notation which is common in robotics. Computer simulation has been conducted to analyze the relationship between the antenna movement velocity (azimuth and elevation direction) and the required actuator torque to control the mechanism so that the antenna always keeps pointing to a satellite 630 km above the earth surface. The simulation results show that antenna movement needs smaller actuator torque in smaller elevation and larger actuator torque in larger elevation. For the antenna dimension and the antenna driving mechanism used in this research, it is obtained that nominal value of actuator torque for pan (azimuth) direction is 30 Nm and for tilt (elevation) direction is 200 Nm.
Co-Authors A.A. Ketut Agung Cahyawan W A.H.B.Baskoro, Catur Hilman Agus Hartanto Anwar Muqorobin Arif Santoso Baskoro, Catur Hilman Adritya Haryo Bhakti Dalmasius Ganjar Subagio Darus, Intan Zaurah Mat Edwar Yazid Estiko Rijanto Fajar Sodiq, Fajar Jamhari Jamhari Lukni Maulana Midriem Mirdanies Nanang Ismail Nor, Nur Safwati Mohd Pahrurrozi, Ahmad Putera, Eka Putra, Mohammad Alexin Rahmayanti, Rifa Rajani, Ahmad Ramadhan, Doni Fajar Riastus Nayanti Ridwan Arief Subekti Rizqi Andry Ardiansyah Roni Permana Saputra Ruchimat, Ruchimat Sanjaya, Kadek Heri Saputra, Ivan Heru Sukma Aditya Utomo, Sapdo Vikita Windarwati Vita Susanti Zain, Mohd Zarhamdy Md Zainal Abidin